Home / 81,152.96-121,564.13-66,213.32

Finding the Fourth Proportional to 81,152.96, 121,564.13 and 66,213.32

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Solution

The fourth proportional to 81,152.96, 121,564.13 and 66,213.32 is: 99,185.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,152.96 : 121,564.13 = 66,213.32 : x
  2. Step 2: Convert to fraction form
    81,152.96/121,564.13 = 66,213.32/x
  3. Step 3: Cross multiply
    81,152.96x = 121,564.13 × 66,213.32
  4. Step 4: Simplify right side
    81,152.96x = 8,049,163,701.32
  5. Step 5: Solve for x
    x = 8,049,163,701.32/81,152.96
  6. Step 6: Final answer
    x = 99,185.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.